Taxing Wages 2019 © Oecd 2019
Total Page:16
File Type:pdf, Size:1020Kb
ANNEX. METHODOLOGY AND LIMITATIONS │ 621 ANNEX. Methodology and limitations Methodology Introduction The personal circumstances of taxpayers vary greatly. This Report therefore adopts a specific methodology to produce comparative statistics covering taxes, benefits and labour costs across OECD member countries1. The framework of the methodology is as follows: The Report focuses on eight different household types which vary by composition and level of earnings. Each household contains a full-time adult employee working in one of a broad range of industry sectors of each OECD economy. Some of the households also have a spouse working less than full-time. The annual income from employment is assumed to be equal to a given fraction of the average gross wage earnings of these workers. Additional assumptions are also made regarding other relevant personal circumstances of these wage earners in order to calculate their tax/benefit position. The guidelines described in the following paragraphs form the basis for the calculations shown in Parts I and II. Annex Table 1 sets out the terminology that is used. Where a country has had to depart from the guidelines, this is noted in the text and/or in the country chapters contained in Part II of the Report. The number of taxpayers with the defined characteristics and the wage level of the average workers differ between OECD economies. Taxpayer characteristics The eight household types identified in the Report are set out in Annex Table 2. Any children in the household are assumed to be aged between six and eleven inclusive. The household is assumed to have no income source other than from employment and cash benefits. The range of industries covered The standard assumption for calculating average wage earnings is based on Sectors B-N of the International Standard Industrial Classification of All Economic Activities (ISIC Revision 4, United Nations)2 (see Annex Table 3). Many countries (for more detailed country information, see Table 1.8) have now adopted this approach TAXING WAGES 2019 © OECD 2019 622 │ ANNEX. METHODOLOGY AND LIMITATIONS Annex Table 1. Terminology General terms Average worker (AW) An adult full-time worker in the industry sectors covered whose wage earnings represent the average for workers. Single persons Unmarried men and women. Couple with two children Married couple with two dependent children between six to eleven years of age inclusive. Labour costs h u of gro w g rn ng ploy r ’ oc l cur y con r bu on n p yroll taxes. Net take-home pay Gross wage earnings less the sum of personal income tax and employee social security contributions plus cash transfers received from general government. Personal average tax rate The sum of personal income tax and employee social security contributions expressed as ( tax burden) a percentage of gross wage earnings. Tax wedge The sum of personal income tax, employee and employer social security contributions plus any payroll tax less cash transfers expressed as a percentage of labour costs. Elasticity of income after tax P rc n g ch ng n ‘ f r- x’ nco follow ng n ncr n on curr ncy un of income before tax (defined more precisely as one minus a marginal tax rate divided by one minus a corresponding average tax rate). Terms used under the income tax Tax reliefs A generic term to cover all the means of giving favourable income tax treatment to potential taxpayers. Tax allowances Amounts deducted from gross earnings to arrive at taxable income. Tax credits Amounts which a taxpayer may subtract from his tax liability. They are described as p y bl f h y c n xc x l b l y ( o h r ‘r fun bl ’ n ‘non- w bl ’ r u ). Standard tax reliefs Reliefs unrelated to the actual expenses incurred by taxpayers and automatically available to all taxpayers who satisfy the eligibility rules specified in the legislation are counted as standard reliefs. These also include deductions for compulsory social security contributions. Basic relief Any standard tax relief available irrespective of marital or family status. Marriage allowance Additional tax relief given to married couples. (In some countries, this is not distinguished from the basic relief which may be doubled on marriage). Non-standard tax reliefs Reliefs wholly determined by reference to actual expenses incurred. Average rate of income tax Amount of income tax payable after accounting for any reliefs calculated on the basis of the tax provisions covered in this Report, divided by gross wage earnings. Schedule rate The rate which appears in the schedule of the income tax and in the schedule of social security contributions. Terms used under cash transfers Cash transfers Cash payments made by general government (agencies) paid to families usually in respect of dependent children. StatLink 2 http://dx.doi.org/10.1787/888933925614 Annex Table 2. Characteristics of taxpayers Marital status Children Principal earner Secondary earner Single individual No children 67% of average earnings Single individual No children 100% of average earnings Single individual No children 167% of average earnings Single individual 2 children 67% of average earnings Married couple 2 children 100% of average earnings Married couple 2 children 100% of average earnings 33% of average earnings Married couple 2 children 100% of average earnings 67% of average earnings Married couple No children 100% of average earnings 33% of average earnings StatLink 2 http://dx.doi.org/10.1787/888933925633 TAXING WAGES 2019 © OECD 2019 ANNEX. METHODOLOGY AND LIMITATIONS │ 623 Annex Table 3. International Standard Industrial Classification of All Economic Activities Revision 3.1 (ISIC Rev. 3.1) A Agriculture, hunting and forestry B Fishing C Mining and quarrying D Manufacturing E Electricity, gas and water supply F Construction G Wholesale and retail trade; repair of motor vehicles, motorcycles and personal and household goods H Hotels and restaurants I Transport, storage and communications J Financial intermediation K Real estate, renting and business activities L Public administration and defence; compulsory social security M Education N Health and social work O Other community, social and personal service activities P Activities of private households as employers and undifferentiated production activities of private households Q Extraterritorial organisations and bodies Revision 4 (ISIC Rev.4) A Agriculture, forestry and fishing B Mining and quarrying C Manufacturing D Electricity, gas, steam and air conditioning supply E Water supply; sewerage, waste management and remediation activities F Construction G Wholesale and retail trade; repair of motor vehicles and motorcycles H Transportation and storage I Accommodation and food service activities J Information and communication K Financial and insurance activities L Real estate activities M Professional, scientific and technical activities N Administrative and support service activities O Public administration and defence; compulsory social security P Education Q Human health and social work activities R Arts, entertainment and recreation S Other service activities T Activities of households as employers; undifferentiated goods- and services-producing activities of households for own use U Activities of extraterritorial organizations and bodies StatLink 2 http://dx.doi.org/10.1787/888933925652 This approach broadly corresponds to the previous calculation based on sectors C-K incl. defined in the International Standard Industrial Classification of All Economic Activities (ISIC Revision 3.1, United Nations) which was adopted in the 2005 edition of Taxing Wages. The reasons for moving to a broadened average wage definition were set out in the Special Feature of Taxing Wages 2003-2004. TAXING WAGES 2019 © OECD 2019 624 │ ANNEX. METHODOLOGY AND LIMITATIONS Defining gross wage earnings This section sets out the assumptions underlying the calculation of the average earnings figures for ‘the average worker’. The gross wage earnings data have been established using statistical data and the methodologies for calculating the earnings data in each country are set out in Annex Table 4. Further information on the calculation of the earnings figures is provided in the country chapters in Part II. The sources of the statistical data for each country are set out in Annex Table 5. The main assumptions are as follows: The data relate to the average earnings in the relevant industry sectors for the country as a whole. The calculations are based on the earnings of a full-time adult worker (including both manual and non-manual). They relate to the average earnings of all workers in the industry sectors covered. No account is taken of variation between males and females or due to age or region. The worker is assumed to be full-time employed during the entire year without breaks for sickness or unemployment. However, several countries are unable to separate and exclude part-time workers from the earnings figures (see Annex Table 4). Most of them report full-time equivalent wages in these cases. In four countries (Chile, Ireland, Slovak Republic and Turkey), the wages of part-time workers can be neither excluded nor converted into full-time equivalents because of the ways in which the earnings samples are constructed. As a result, average wages reported for these countries will be lower than an average of full-time workers (for example, an OECD Secretariat analysis of available Eurostat earnings data for selected European countries has shown that full-time employees’ earnings in 2014 were on average 12% higher than earnings of all employees and 4% higher than earnings of all employees expressed in full-time equivalent units). Also, in most of the OECD countries where sickness payments are made by the employer, either on behalf of the government or on behalf of private sickness schemes, these amounts are included in the wage calculations. It is unlikely that this has a marked impact on the results since employers usually make these payments during a short period and the amounts usually correspond very closely to normal hourly wages.